<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>

        *{margin:0;padding:0;}
        body{color:#333}
        .parent{width:1000px;overflow: hidden;margin-left:auto;margin-right: auto}
        .parent>div{width:238px;border:1px solid #dedede;height:344px;float:left}
        .parent>.child{margin-right:13px}
        .parent>.two{margin-right:14px;}

    </style>
</head>
<body>
<div class="parent">
    <div class="child"></div>
    <div class="child"></div>
    <div class="two"></div>
    <div ></div>
</div>
</body>
</html>